return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3COOH (Acetic acid)

using model chemistry: B3LYP/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/CEP-31G
 hartrees
Energy at 0K-45.603295
Energy at 298.15K-45.608044
Nuclear repulsion energy66.106744
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at B3LYP/CEP-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3658 3542 31.23      
2 A' 3196 3095 17.94      
3 A' 3072 2975 4.26      
4 A' 1698 1645 255.36      
5 A' 1485 1438 28.01      
6 A' 1427 1382 44.49      
7 A' 1324 1282 69.62      
8 A' 1165 1128 172.32      
9 A' 996 965 97.40      
10 A' 841 814 11.29      
11 A' 548 531 42.33      
12 A' 404 391 6.14      
13 A" 3151 3052 17.28      
14 A" 1486 1439 17.95      
15 A" 1082 1048 10.53      
16 A" 639 619 166.29      
17 A" 534 517 29.54      
18 A" 88 85 0.68      

Unscaled Zero Point Vibrational Energy (zpe) 13396.9 cm-1
Scaled (by 0.9684) Zero Point Vibrational Energy (zpe) 12973.6 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at B3LYP/CEP-31G
ABC
0.35504 0.30206 0.16841

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.167 -0.806 0.000
C2 0.000 0.175 0.000
O3 0.061 1.423 0.000
H4 2.112 -0.246 0.000
H5 1.107 -1.454 0.890
H6 1.107 -1.454 -0.890
O7 -1.231 -0.501 0.000
H8 -1.979 0.145 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.52442.48831.09811.10231.10232.41723.2869
C21.52441.25002.15342.16112.16111.40421.9795
O32.48831.25002.64413.18793.18792.31812.4081
H41.09812.15342.64411.80521.80523.35234.1098
H51.10232.16113.18791.80521.77982.67703.5883
H61.10232.16113.18791.80521.77982.67703.5883
O72.41721.40422.31813.35232.67702.67700.9888
H83.28691.97952.40814.10983.58833.58830.9888

picture of Acetic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 127.220 C1 C2 O7 111.183
C2 C1 H4 109.317 C2 C1 H5 109.671
C2 C1 H6 109.671 C2 O7 H8 110.421
O3 C2 O7 121.597 H4 C1 H5 110.246
H4 C1 H6 110.246 H5 C1 H6 107.669
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.320      
2 C -0.137      
3 O -0.106      
4 H 0.180      
5 H 0.170      
6 H 0.170      
7 O -0.334      
8 H 0.379      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.024 -1.837 0.000 1.837
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.860 -3.663 0.000
y -3.663 -29.368 0.000
z 0.000 0.000 -23.180
Traceless
 xyz
x 7.413 -3.663 0.000
y -3.663 -8.347 0.000
z 0.000 0.000 0.934
Polar
3z2-r21.868
x2-y210.507
xy-3.663
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.538 -0.118 0.000
y -0.118 4.824 0.000
z 0.000 0.000 2.707


<r2> (average value of r2) Å2
<r2> 62.531
(<r2>)1/2 7.908